File content as of revision 27:8bb2bd97c319:

#ifndef ALIEN_H
#define ALIEN_H
 
// Included libraries ----------------------------------------------------------
#include "mbed.h"
#include "N5110.h"
#include "Gamepad.h"
#include "Weapons.h"
#include "Position.h"

/** Alien class
 * @brief Draws and moves aliens 
 * @author Benjamin Evans, University of Leeds
 * @date May 2020
 */ 
class Alien: private Position {
    public:
        /** Constructor */
        Alien();
        
        /** Destructor */
        ~Alien();
        
        /** Initalises Alien */
        void init(Gamepad &pad);
    
        /** Draws the alien
         * @param lcd @details N5110 object
         * @param spaceship_pos @details xy spaceship position
         * @param d_ @details Direction of joystick
         * @param map_length_ @details length of map
         * @param position_x_map_ @details x position of map
         */
        void draw_alien(N5110 &lcd, Vector2D spaceship_pos, Direction d_, 
        int map_length_, int position_x_map_);
        
        /** Checks if bullet collides with a alien 
         * @param bullet @details Weapons object
         */
        bool check_collision(Weapons bullet);
    
    // Accessors and mutators --------------------------------------------------
    
        /** Gets the xy position of the alien
         * @return position_x_alien_ 
         * @return position_x_alien_
         */
        Vector2D get_pos();
    
    private:
    // Function prototypes -----------------------------------------------------
       
        /** Moves the alien towards the spaceship and around the map 
         * @param spaceship_pos @details : Position of the spaceship
         */
        void move_hunt_mode(Vector2D spaceship_pos);
       
        /** Calulates the aliens movement depeding on spaceship positions and 
         * joystick input 
         * @param d_ @details : Direction object of joystick
         * @retrun integer @details move alien value for alien draw function 
         */
        int calc_alien_movement(Direction d_);
        
        /** Generates the random move dirction and length for the alien*/
        void set_random_move();
        
        /** Gets the movement direction of the alien */
        void move_direction();
        
        /** Changes the x and y positions of the alien depeding on the movement 
         * direction 
         * @param x_change @details number to change alien x position by
         * @param y_change @detials number to change alien y position by
         */
        void set_alien_direction(int x_change,int y_change);
        
        /** Stops the alien from moving off the edge of the map and moves alien 
         * if the map loops
         * @param map_length_@details : length of the map  
         * @param position_x_map_ @detials : the drawing start posisiton of the 
         * map 
         */
        void off_screen_x_y_checker(int map_length_, int position_x_map_);
        
    // Variables ---------------------------------------------------------------
         
        /** Alien movement counter */
        int alien_move_counter;
         
        /** Alien randome move counter */
        int random_move_counter_;
         
        /** Random direction variable */
        int random_direction_;     
};
 
#endif